47results about How to "Reduce emission concentration" patented technology

The invention belongs to the field of engine aftertreatment systems, and provides a composite two-stage SCR system, a control method, an aftertreatment system.The system comprises a first SCR, a first ASC, a DOC, a DPF, a second SCR, a second ASC, a calculation control unit, an electric heating device, a gas concentration detection unit and an exhaust temperature unit; and the control unit is used for determining a urea injection control strategy of the first SCR and the second SCR and a working strategy of the electric heating device according to the nitrogen oxide concentration and the nitrogen dioxide proportion detected by the gas concentration detection unit and the temperature obtained by the exhaust temperature unit, and respectively controlling the first SCR, the second SCR and the electric heating device to work according to the determined strategies. According to the invention, the cooperative control requirement of ultralow nitrogen oxide emission and nitrous oxide gas emission limitation of the diesel engine can be met.

The invention discloses a passive nuclear steam supply system which is characterized in that two ends of a hot-section main pipeline are respectively connected with a reactor pressure vessel and a steam generator, a main pump is vertically connected with the steam generator, two ends of a cold-section main pipeline are respectively connected with the pressure vessel and the main pump, the hot-section main pipeline is provided with a first liquid level pressure tap and a second liquid level pressure tap, and the cold-section main pipeline is provided with a second liquid level pressure tap. The first liquid level pressure tap is located at the bottom of the hot section main pipeline, the second liquid level pressure tap is close to the steam generator and located at the top of the hot section main pipeline, the reactor coolant system further comprises a pressure stabilizer and a surge pipe, one end of the surge pipe is connected to one of the hot section main pipelines, and the other end of the surge pipe is connected to the bottom of the pressure stabilizer. The passive nuclear steam supply system can allow the rated power of the reactor core to be remarkably improved.

The invention relates to the technical field of carbon dioxide recovery waste gas purification, in particular to waste gas purification equipment for carbon dioxide recovery and a purification method thereof.The waste gas purification equipment for carbon dioxide recovery comprises a shell assembly and further comprises a slag removal assembly, and the slag removal assembly comprises a fixed cylinder and a rotating part; the rotating component comprises a slag removal motor, a first stirring plate and a second stirring plate, a fan-shaped shell is fixedly mounted at the bottom of the outer cylinder, a water outlet part is arranged at the bottom of the fan-shaped shell, and a collecting component is arranged in the fan-shaped shell, and the waste gas purification method for carbon dioxide recovery comprises the steps of spraying, purification and the like. The device has the advantages that sediments in the lime water are continuously removed in the waste gas purification process, the negative influence of sediment accumulation on the sulfur dioxide removal efficiency is avoided, sulfur dioxide in the waste gas is effectively purified, corrosion of the sulfur dioxide to subsequent carbon dioxide recovery equipment is reduced, and the reliability and the safety of a whole waste gas treatment system are improved.

The invention relates to the technical field of boiler flue gas filtration, in particular to a gas inlet device for boiler flue gas filtration. The air inlet device for boiler flue gas filtration comprises an air inlet pipeline, rotating valves, an executing mechanism, fan blades, a transmission mechanism, a cleaning pool and a perforated pipe, the input end of the air inlet pipeline communicates with a boiler body, the output end of the air inlet pipeline communicates with a dust remover, and the rotating valves are installed in the air inlet pipeline and close to the input end at equal intervals; an executing mechanism is installed between the rotating valve and the gas inlet pipeline and used for driving the rotating valve to be opened and closed so as to control the gas inlet amount of the flue gas. According to the air inlet device for boiler flue gas filtration, the amount of flue gas generated by combustion in a boiler can be monitored in real time through the integrated sensor and the control system, the opening degree of the rotating valve is intelligently adjusted according to the data, accurate adjustment of the opening degree of the rotating valve is ensured through a worm and gear and a bevel gear transmission system in the executing mechanism, and the operation efficiency is improved. Therefore, the amount of flue gas entering the dust remover can be accurately controlled.

The invention provides an ammonia fuel cracking supply system of a gas turbine. The system comprises a liquid ammonia storage tank, a liquid ammonia supply pump, an air vaporizer, a heat exchanger, a first ammonia cracker, a compression and expansion all-in-one machine, the gas turbine and the like. Wherein liquid ammonia is supplied to the air vaporizer through the liquid ammonia supply pump; one end of the heat exchanger is communicated with the air vaporizer, and the other end is communicated with the first ammonia cracker; one end of a compression-expansion all-in-one machine introduced by the system is communicated with the heat exchanger, and the other end is communicated with the gas turbine. The air vaporizer adopts an exhaust heat source to gasify liquid ammonia into ammonia gas. Ammonia gas discharged from the air vaporizer enters the heat exchanger, exchanges heat with cracked gas after cracking to be heated, and then is guided into the first ammonia cracker. Ammonia gas is decomposed into mixed gas of hydrogen and nitrogen in the first ammonia cracker, the mixed gas can enter the heat exchanger, and the mixed gas enters the compression and expansion all-in-one machine after being subjected to heat exchange and cooling in the heat exchanger, and is conveyed to the gas turbine after being pressurized and cooled.

The invention discloses a data-driven urban solid waste incineration process multi-objective operation optimization method, and belongs to the field of intelligent optimization. The method comprises the steps that firstly, nonlinear characteristics of the urban solid waste incineration process are captured through a self-organizing radial basis function neural network, accurate evaluation of operation performance index combustion efficiency and nitrogen oxide emission concentration is achieved, and an accurate optimization target model is provided for follow-up set value optimization solution; then, on the basis of the established optimization target model, a multi-target particle swarm optimization algorithm based on a double-file mechanism is designed, and an optimal solution set of set values of the primary air inlet flow and the secondary air inlet flow is obtained; and according to the optimal solution set, designing a utility function to determine optimal set values of the primary air inlet flow and the secondary air inlet flow, and keeping a relatively high combustion efficiency level while realizing that nitrogen oxide emission reaches the standard. According to the method, the combustion efficiency and the denitration efficiency can be synergistically improved, and efficient and green operation of the urban solid waste incineration process is promoted.

The invention relates to the technical field of incineration fly ash treatment, and discloses a fly ash internal circulation treatment system and method. The fly ash internal circulation treatment system is used to treat the fly ash in an internal circulation manner, and the method comprises the following steps: flue gas purification treatment, flue gas filtration treatment, fly ash storage treatment and fly ash circulation treatment. The invention utilizes the unreacted fly ash at the bottom of a rotary spray deacidification reaction tower to carry out a secondary reaction, and pneumatically conveys the fly ash to the horizontal flue of the rotary spray deacidification reaction tower to react with acidic gas in the flue gas, thereby reducing pollutant emissions. The coordinated use of the ash storage system and the internal circulation system can reduce the pollution risk of fly ash to the environment and reduce the emission concentration of pollutants during the incineration process. On the other hand, the fly ash treatment cost is reduced, the auxiliary material consumption is reduced, the operating efficiency of the incinerator is improved, and the power generation is increased.

This invention relates to the field of pulverized coal conveying and dust removal technology, specifically to a pulverized coal dust removal method, comprising: S1: Constructing a dust removal system: setting up a dust cover on a conveyor belt, setting up a pressure-reducing chamber on the dust cover, installing wear-resistant baffles at the bottom of the dust cover, and installing a dust curtain inside the dust cover; installing a dust collector at the top of the dust cover; S2: Coal conveying and primary dust removal: starting the conveyor belt to transport coal, the coal falls onto the conveyor belt, and the generated dust-laden gas forms a local high-pressure zone under the obstruction of the dust curtain, causing a portion of the dust-laden gas to undergo primary filtration through the filter components on the pressure-reducing chamber; S3: Secondary dust removal: the remaining dust-laden gas in the dust cover is sucked into the dust collector, the dust-laden gas enters below the liquid surface of the dust collector, causing the pulverized coal particles to settle and form coal slurry, which is then transported outside the dust collector, and the purified gas is discharged through the outlet. This method achieves closed-loop control of the entire process from source dust suppression to end-of-pipe treatment through two-stage synergistic dust removal, improving the dust removal effect.

The utility model discloses an ion exchange resin device convenient to regenerate, which comprises a resin tank, a lower filter plate is hermetically arranged at the lower part of the resin tank, and a water collecting filter plate is hermetically arranged at the upper part of the resin tank; an overflow port and a pressure relief port are respectively formed in the top of the resin tank, and a water outlet and an air inlet are respectively formed in the bottom of the resin tank; a water inlet is formed in the upper part of the resin tank between the water collecting filter plate and the lower filter plate; and a regenerant inlet is formed in the side wall of the resin tank below the lower filter plate. The device has the advantages that the regenerant can be in full contact with resin all the time, so that the resin is fully regenerated, the utilization rate of the regenerant is increased, the consumption of the regenerant is reduced, the discharge amount and the discharge concentration of regenerated waste liquid are reduced, and the economic benefit is remarkable. The backwashing fan blows air into the resin tank to disturb the resin, so that the regeneration effect is improved, the resin can be loosened, the adsorption effect in the adsorption process is improved, and the effluent quality is improved.

The utility model discloses a coal body permeability measuring device based on pulse pressure, which comprises an electric control device, a coal sample holder, a gas inlet system and a gas outlet system, a coal sample is clamped in the coal sample holder, the inlet end of the coal sample holder is connected with a main gas inlet pipe, the main gas inlet pipe is used for introducing gas into the coal sample and applying pulse pressure, and the gas inlet system is connected with the gas outlet system. A first pressure sensor is arranged on the main air inlet pipe; the upstream end of the main air inlet pipe is connected with a first pipeline and a second pipeline; the coal sample holder is connected with a confining pressure loading device and an axial pressure loading device; a first electronic flowmeter is arranged on the first pipeline; the second pipeline is connected with a pulse pressure generator, and a pulse pressure sensor and a pneumatic check valve are arranged on the second pipeline; a second pressure sensor and a second electronic flowmeter are arranged on the air outlet pipeline; in the experiment process, the pulse pressure generator can be adjusted to apply different pulse pressures to the coal sample, the permeability of the corresponding coal sample is observed, and the optimal pulse pressure is provided for gas extraction before coal mining, so that the relatively best gas extraction effect is realized.

The invention discloses a flue gas re-burning low-nitrogen treatment system, and relates to the technical field of flue gas treatment, the flue gas re-burning low-nitrogen treatment system comprises a recovery unit, a flue gas treatment unit and a flue gas re-burning unit, the recovery unit comprises a recovery pipeline, the recovery pipeline is connected with a chimney, flue gas recovered by the recovery unit through the recovery pipeline is treated by the flue gas treatment unit, and the flue gas re-burning unit is connected with the flue gas treatment unit. The flue gas treatment unit comprises a demister and a condenser, treated flue gas enters the flue gas re-burning unit, a flue gas incinerator is arranged in the flue gas re-burning unit, and the flue gas is subjected to re-burning and nitrogen reduction treatment through the flue gas incinerator. About 30% of smoke is sucked back to participate in re-burning, and the total amount of smoke directly discharged from the chimney to the atmosphere is correspondingly reduced; the flue gas is subjected to low-nitrogen treatment through flue gas re-burning, so that the emission concentration and emission amount of pollutants are reduced, the problem of secondary pollution caused by re-treatment is avoided, other potential safety hazards of operation are avoided, and the flue gas re-burning system is relatively low in investment cost and remarkable in treatment effect.

The utility model discloses a layered and opposite type sinking burner for ladle roasting, including gas pipeline, primary air casing, secondary air casing and tertiary air casing, the upper end of gas pipeline is used for with gas supply pipeline intercommunication and the lower end opening forms gas spout, the gap between primary air casing and gas pipeline forms primary air channel, the gap between secondary air casing and primary air casing forms secondary air channel, the gap between tertiary air casing and secondary air casing forms tertiary air channel, and primary air channel, secondary air channel and tertiary air channel are all used for with preheating combustion air pipeline intercommunication, and the lower end opening of primary air casing forms primary air spout, and the lower end opening of secondary air casing forms secondary air spout, and the lateral wall of tertiary air casing is equipped with a plurality of tertiary air spout. Can guarantee the full mixing of gas and combustion air, and can make full use of the heat of high temperature flue gas, and can carry out effective afterburning treatment to the unburnt component remaining in high temperature flue gas.

The invention discloses a citrus peel progressive extraction method and a device thereof. Citrus peel essential oil and citrus core can be recovered by pretreating and progressively extracting the citrus peel. In the process of progressive extraction of the citrus peel, high value-added products such as citrus peel infusion syrup, hesperidin, pectin, dietary fiber, etc. can be obtained in sequence, which has extremely important economic value. The method and the device of the invention can sequentially complete the extraction of citrus infusion syrup, hesperidin, pectin and purification of dietary fiber raw materials without transferring the citrus peel, transforming the traditional complicated extraction operation into a simplified, systematic and continuous operation, greatly improving labor efficiency and reducing material and power consumption. The invention adopts a secondary or tertiary extraction phase process, greatly improving the concentration of the extract in the extract, improving the product recovery rate, and truly realizing the full utilization of the citrus peel, thus expanding extremely important new resources for the development of the food processing industry.

The present invention relates to a method for treating radioactive waste tail gas by using plasma technology, comprising the steps of: performing plasma gasification and melting treatment on radioactive waste in a combustion chamber; solidifying the glass body, and desulfurizing and denitrifying the flue gas in a dry and water-free high-temperature catalytic ceramic filter; fully burning the unburned combustible materials in the flue gas in the second combustion chamber; the flue gas enters the SNCR denitrification device for denitrification; the flue gas enters the G-L heat exchanger for heat exchange; the flue gas enters the semi-dry quenching tower for heat exchange; the flue gas enters the bag filter for dust removal; the flue gas at the bag filter outlet is filtered through a high-efficiency combined filter. The beneficial effects of the present invention are: in the high-temperature section, most of the dust and ash are filtered out by the high-temperature catalytic ceramic filter, and then through the bag filter, most of the nuclides in the dust and fly ash are solidified by the glass body or intercepted in the fly ash, and the remaining small amount of I-129 and Tc-99 are purified by the high-efficiency combined filter; clean and qualified flue gas is obtained.

The application discloses a kind of pollutant removal systems based on superfine grinding modified fly ash, pollutant removal system includes: boiler, gas-solid separator and drum ball mill, boiler has hearth for combustion and tail flue with hearth communication, the inner wall of drum ball mill is equipped with annular baffle, annular baffle forms modification cavity near the side of fly ash import, gas-solid separator is communicated with fly ash import to import fly ash into modification cavity, annular baffle is used to block the fly ash particles of particle size D50 greater than 20 microns, and allow the fly ash of particle size D50 less than or equal to 20 microns to flow to fly ash export through the center opening of annular baffle, modifier is mixed with fly ash retained in modification cavity and is ground to form fly ash-based adsorbent of particle size D50 less than or equal to 15 microns, fly ash-based adsorbent is discharged from fly ash-based adsorbent export and is transported to the top of hearth and is sprayed, for adsorbing and removing pollutants, to realize the efficient removal of special pollutants such as heavy metals at low cost.

The present invention belongs to the field of engine aftertreatment system, and provides a composite two-stage SCR system, control method, aftertreatment system and vehicle, wherein the system includes a first SCR, a first ASC, a DOC, a DPF, a second SCR, a second ASC, a calculation control unit, an electric heating device, a gas concentration detection unit and an exhaust temperature unit, and determines the urea injection control strategy of the first SCR and the second SCR and the working strategy of the electric heating device according to the nitrogen oxide concentration and nitrogen dioxide ratio detected by the gas concentration detection unit and the temperature obtained by the exhaust temperature unit, and controls the first SCR, the second SCR and the electric heating device to work respectively according to the determined strategy. The present invention can meet the coordinated control requirements of ultra-low nitrogen oxide emissions and nitrous oxide gas emission restrictions of diesel engines.

The utility model discloses a tail gas purification treatment device of biological oxidation gold extraction relates to tail gas purification treatment device technical field, the utility model discloses a main frame mechanism, the main frame mechanism includes the purification tower, the left side fixedly connected with the air inlet pipeline of purification tower outer surface, the top fixedly connected with the exhaust pipe of purification tower, the bottom fixedly connected with the deflector of purification tower inside, the utility model discloses a purification subassembly is set up, specifically is through setting up multilayer carbon filling layer, and carbon filling layer adopts the mixture of active carbon and modified molecular sieve, can increase the contact area and contact time of tail gas and absorption liquid and adsorbent, improve the removal efficiency to harmful gas, simultaneously, sodium hydroxide and hydrogen peroxide in absorption liquid can carry out chemical reaction and oxidation decomposition to different properties harmful gas, thereby realize the efficient purification to multiple harmful gas, effectively reduced the emission concentration of harmful substance in tail gas, and the environmental protection emission standard has been greatly improved.

The present invention relates to a simple large-flux direct-fired waste gas environmental protection treatment device, including a shell, a combustion chamber is arranged in the center of the shell, the top of the combustion chamber is connected to the exhaust pipe, the gap between the combustion chamber and the inner wall is a preheating channel, the preheating channel is connected to the air inlet, and a burner is arranged at the bottom of the combustion chamber; the first waste gas overfire cage, the second waste gas overfire cage, and a U-shaped heat storage body are arranged in sequence from bottom to top in the combustion chamber. The present invention has low cost and simple structure, omits the concentration link and the catalytic link, has a large waste gas flux and a large preheating space, and the waste gas is fully cut and rotated by the stainless steel wire filler in the combustion chamber to achieve complete decomposition, which greatly improves the overfire decomposition efficiency of the waste gas, and achieves that the emission concentration after waste gas treatment is lower than the national emission standard, while greatly reducing the cost expenditure and gas consumption.

The utility model discloses an ultralow temperature economizer of a secondary reheat unit, which relates to the technical field of economizers, and comprises a coal-saving shell, a sealing cover plate is arranged right above the coal-saving shell, the top end of the sealing cover plate is connected with a liquid injection pipe in a penetrating manner, a positioning mechanism is arranged right below the sealing cover plate, and the liquid injection pipe is connected with the liquid injection pipe in a penetrating manner. A positioning mechanism is arranged in the coal-saving shell, the diameter and the width of the heat exchange pipe fitting are adjusted through the positioning mechanism according to the heat exchange requirement, the requirement for positioning the two sides of the heat exchange pipe fittings of different sizes is met, a purification mechanism is arranged in the coal-saving shell, the purification mechanism is used for purifying injected flue gas, and the purification mechanism is used for purifying the flue gas. Dust in the flue gas is prevented from being directly attached to the surface of the circulating pipe to influence the heat absorption efficiency of the circulating pipe. In the using process, transverse distance adjustment is carried out through the side supporting arms arranged on the two sides, locking treatment is carried out on the side supporting arms and the transverse guide grooves through the fastening holes formed at equal intervals, and positioning treatment is carried out on the two sides of the snake-shaped heat exchange pipe according to using requirements.

The invention discloses an ammonia combustion circulating fluidized bed boiler system. The system comprises an ammonia storage tank for storing ammonia gas; the upper part of a hearth of the fluidized bed furnace is a dilute-phase region, the lower part of the hearth of the fluidized bed furnace is a dense-phase region, at least one ammonia burner for burning ammonia gas is arranged in the hearth of the fluidized bed furnace, and a nozzle is arranged on the ammonia burner; the air preheater is used for heating air into primary hot air and secondary hot air, and the primary hot air and the secondary hot air enter the dense-phase area through a primary hot air pipeline and a secondary hot air pipeline; the primary fan and the secondary fan are used for supplying air to the air preheater; the cyclone separator is used for collecting combustion products of the ammonia combustor; the tail flue is used for conveying the gas separated by the cyclone separator into the air preheater to perform heat exchange with the primary hot air and the secondary hot air; and the material returning device is used for conveying the solid separated by the cyclone separator to the dense-phase region. High-efficiency and low-pollution combustion of ammonia gas is carried out by adopting a circulating fluidized bed combustion mode, so that zero carbon emission is realized.

The utility model belongs to the technical field of flue gas denitration, and particularly relates to a flue gas flow mixing device capable of accurately spraying ammonia, which comprises a flow mixing box body, a servo motor is fixedly connected to the bottom of the outer side wall of the mixed flow box body; the outer side wall of the servo motor is fixedly connected with an air outlet pipe. The top of the outer side wall of the servo motor is fixedly connected with an ammonia storage tank; the output end of the servo motor is fixedly connected with a hollow rotating shaft; two pairs of exhaust grooves are formed in the side wall of the hollow rotating shaft; a plurality of fan blades are fixedly connected to the outer side wall of the hollow rotating shaft; two pairs of fixing blocks are fixedly connected to the outer side wall of the hollow rotating shaft; the bottom of the outer side wall of the fixing block is fixedly connected with a connecting rope. A plurality of fixing grooves are fixedly connected to the outer side wall of the hollow rotating shaft; a cover plate is fixedly connected to the top of the outer side wall of the fixing groove. A sealing plate is fixedly connected to the bottom of the outer side wall of the connecting rope; by arranging a sealing plate, an exhaust groove and fan blades, ammonia gas can be in full contact with flue gas in the mixed flow box body when equipment runs, and efficient mixing of the ammonia gas and the flue gas is achieved.

The application provides a method for preparing sulfuric acid from pyrite concentrate powder and belongs to the technical field of resource utilization. The method comprises the following steps: (1) crushing and screening pyrite concentrate powder raw materials to obtain fine pyrite concentrate powder; (2) introducing air into a fluidized roasting furnace, suspending and roasting the fine pyrite concentrate powder in the furnace, cooling the outlet furnace gas by heat absorption, further water-moistening the residue after roasting of the fluidized roasting furnace and slag dust generated in the production process after water cooling, and then transporting the residue and the slag dust to obtain roasted sand; (3) performing dust removal, mist removal, further cooling and drying treatment on the outlet furnace gas in the step (2) to obtain SO2-containing furnace gas, spraying sulfuric acid on the SO2-containing furnace gas after air supplement, cooling, and then storing liquid into a finished product storage tank and performing drying treatment on gas; and (4) performing catalytic oxidation and heat exchange treatment on the dried gas, absorbing SO3 in the furnace gas by using concentrated sulfuric acid, performing hydrogen peroxide treatment on tail gas, and then performing mist removal and standard discharge. The method has the advantages of simple production process, environmental protection in the production process and improved resource utilization rate.

This invention provides an ammonia oxidation device for ammonia desulfurization, belonging to the field of ammonia desulfurization technology. It includes a support frame, with an ammonia addition mechanism, a processing mechanism, and an oxidation mechanism fixedly installed on the top surface of the support frame. The generation of large-particle crystals reduces crystal adhesion and blockage within the equipment, lowering maintenance costs and operational failure rates. This invention separates the ammonia addition point from the oxidation tank, establishing an independent ammonia addition tank, thus completely separating the ammonia addition and oxidation processes. The ammonium sulfite solution in the absorbent after ammonia addition can better react with SO₂ in the flue gas during absorption, avoiding the problem of uneven stratification between the absorbent and oxidation liquids in traditional integrated ammonia oxidation devices. This significantly improves SO₂ absorption efficiency, effectively reducing the SO₂ emission concentration in the flue gas and meeting increasingly stringent environmental protection requirements.

This utility model discloses a dust collection device for fused white fused alumina, comprising an air inlet pipe, a U-shaped dust removal pipe, and a buffer pipe. The U-shaped dust removal pipe and the buffer pipe are respectively connected to the top two ends of the air inlet pipe. A positioning plate is fixedly installed on the bottom inner wall of the air inlet pipe. A J-shaped air guide pipe is fixedly installed in the center of the positioning plate through an opening. A bearing is fixedly installed on the outer wall of the other end of the J-shaped air guide pipe, and a metal mesh cover is fixedly installed on the outer ring of the bearing. This utility model introduces dust-containing gas through the air inlet pipe. The gas then enters the rotating metal mesh cover through the J-shaped air guide pipe, dispersing into fine bubbles that enter the U-shaped dust removal pipe. This allows for thorough mixing of the gas and solution, greatly increasing the contact area between the gas and solution, enabling the dust to be fully mixed and adsorbed. This more efficiently removes dust from the gas, effectively reducing the dust emission concentration during the smelting of white fused alumina and minimizing pollution to the surrounding environment.

The utility model discloses a silencer with a tail gas purification device, which belongs to the technical field of excavator tail gas treatment and comprises a barrel, and end plates are arranged at two ends of the barrel to seal the barrel. A partition plate and a DOC unit are arranged in the barrel in the radial direction, the interior of the barrel is sequentially divided into a first area, a second area and a third area by the DOC unit and the partition plate, a silencing pipe is further arranged in the barrel in the axial direction and penetrates through the DOC unit and the partition plate, and a plurality of holes are formed in the outer wall, corresponding to the first area and the third area, of the silencing pipe. An air inlet is formed in the side wall of the barrel corresponding to the second area, and an exhaust tail pipe is fixedly arranged at the top of the barrel corresponding to the third area.

The present invention discloses a composite reductant synergistic denitration system for a coal-fired boiler, the system comprising a boiler, an amino reductant injection system and a methane injection system; the amino reductant injection system comprises an amino reductant supply unit and an amino reductant spray gun; the methane injection system comprises a methane supply unit and a methane spray gun; the boiler is provided with a low-nitrogen burner in the main combustion zone and a SOFA air nozzle in the burnout zone; the methane spray gun and the amino reductant spray gun are sequentially arranged between the low-nitrogen burner and the SOFA air nozzle. A composite reductant synergistic denitration method for a coal-fired boiler, based on the above-mentioned system, a methane spray gun is arranged in the main combustion zone of the boiler furnace below the amino reductant spray gun in the main combustion zone, and the injected methane is pyrolyzed to produce CHi + and H + Active free radicals react with the amino reducing agent sprayed from the amino reducing agent spray gun to generate NH2 ‑ , improve the denitrification efficiency of ammonia injection in the main combustion zone.

The application discloses an activated carbon hazardous waste treatment method and relates to the field of hazardous waste treatment, aiming to solve the problems of traditional processes in parameter control, regeneration effect and safety guarantee and the like, and specifically comprises the following steps: collecting organic functional group characteristic data and water content data of activated carbon hazardous waste to be treated; inputting a machine learning model and outputting target temperature T L of a low-temperature section of a rotary kiln, target temperature T H of a high-temperature section and minimum residence time t of the high-temperature section; controlling the low-temperature section of the rotary kiln to treat the activated carbon hazardous waste in the interval [T L -15 ℃, T L +15 ℃] according to T L , and detecting the concentration of benzene series, and when the concentration is reduced to a predetermined concentration, the activated carbon hazardous waste is transported to the high-temperature section; controlling the high-temperature section of the rotary kiln to be treated for at least t minutes in the interval [T H -20 ℃, T H +20 ℃] according to T H and t; and sending the activated carbon hazardous waste from a discharge port of the rotary kiln into a quenching tower. The application improves the recycling value of the regenerated activated carbon, and takes into account the environmental protection effect and treatment economy.

This utility model discloses a high-efficiency and environmentally friendly bulk cargo hopper structure, comprising: a main frame assembly; a feeding channel disposed above the main frame assembly; a dust removal mechanism disposed on the side wall of the feeding channel; a dust removal grid disposed at the bottom of the feeding channel; a double-hopper mechanism disposed below the dust removal grid and connected to the main frame assembly; and a telescopic chute mechanism disposed at the bottom of the double-hopper mechanism and connected to the double-hopper mechanism. The dust removal mechanism includes: a dust removal box disposed on the side wall of the feeding channel and connected to the double-hopper mechanism; a negative pressure fan disposed on the dust removal box; a filter cartridge assembly disposed inside the dust removal box; a pulse valve assembly disposed on the dust removal box and connected to the dust removal box; and a suction pipe connected at one end to the dust removal box and at the other end to the telescopic chute mechanism. Compared with the prior art, the technical solution disclosed in this utility model has high loading and unloading efficiency, can reduce the dust emission concentration in the working area, and reduce air pollution and material loss.

The present invention provides a coal-fired boiler coupled with a biomass gas combustion device and a method for arranging its combustion system, and belongs to the technical field of boiler combustion devices and methods for arranging their combustion systems. The biomass gas combustion device of the present invention is arranged in a wind box, a central air duct is fixed in a gas channel, the central air duct and the gas channel are arranged in concentric circles, a secondary air duct is fixed outside the rear end of the gas channel, the secondary air duct and the gas channel are arranged in concentric circles, a secondary air swirl device is fixed at the air inlet end of the secondary air duct, a central air swirl device is arranged at the rear end in the central air duct, a gas swirl device is provided between the rear end of the gas channel and the rear end of the central air duct, and a central air introduction channel is fixed at a position centered in front and behind the gas channel and communicates with the central air duct. Using the method for arranging the combustion system of a coal-fired boiler coupled with a biomass gas combustion device, the biomass gas combustion device is arranged between the upper pulverized coal burner and the OFA burner.

The invention discloses a bilge well detection intelligent control system which comprises an MCU system management module and a pumping gas detection module used for detecting gas information in a bilge well. The liquid level detection module is used for detecting liquid level information in the sewage well; the power management module is used for managing power supply and standby power consumption of each module; the 4G communication equipment is used for transmitting the acquired gas information and liquid level information to the background server; the OTA upgrading module is used for carrying out upgrading management on each module in the system; the automatic production module is used for detecting whether the functions of all the modules are normal or not, automatically detecting the running states of all the modules and reporting the running states to a PC tool when products are produced in a factory, so that rapid production is realized, and misjudgment of manual operation is reduced; and the battery management module is used for performing electric energy management on battery charging and discharging and battery electric quantity. Accurate data acquisition and detection are realized, corresponding processing strategies are formulated, and potential safety hazards of the sewage well are eliminated.